I always used to ask the receptionist and front office staff how they were treated when young people came in for interviews. One other "lunch test" I've always heard of is to see if someone salts their food before tasting it. It is a sign of jumping to a conclusion out of habit before getting a good assessment of the reality of the situation.
I would fail this test I am such a salt addict that I routinely salt my food without tasting it only to find I need to add more.